Island



\ E.' CARD.

Stove Grate.

No. 97,477. A Patented Dec. 7, 1869l strat @Militia Letters EctentNo.. 97,477, dated December 7, 1869.

The Schedule referred to in these Letters Patent and making part -of the same.

To all whom it may concm'n: Beit known that l, EDWAD GARD, ot' Pawtucket, 4county of Providence, and State of Rhode Island,

. have invented a new and improved Mode of Constructing Fire-(Srratesgl and the following is afull and clear description of the same, reference being had to the accompanying drawings, and to the-letters of reference marked thereon, in Which- Figure 1 is a top plan. Figure 2 is a longitudinal central section of plan. Figure 3 is an end section. Similar letters of reference, when they occur in the several separate tigures,de1iote likeparts in all the drawings.

My invention relates to afire-grate for wood or coal, in which there are threeor more parallel spiral or auger-shaped bars', so placed, with referenceto each other,

that by turning or revolving one ovl" the hars upon its journals, hy means of' a crank or key attached to one end, thegrate may he turned or the bars revolved iudependeut of the grate-franle, thus performing the double oiiice of raking and sifting the ashes and dum pf ing the. cinders. i ff'.

To enable others skilled-in the art to make and use my invention, l will proceed to describe the same, with reference to the drawings.

A represents a tire-grate, constructed with three or more parallel spiral or auger? shaped bars B B' B", one of the-bars, as B', being a right-andleft hand bar, so as to turn all the bars `on either side of it.A

a and a' represent the journals of the bar, on which the bar may revolve or the whole grate' beyturned.

.By applying a crank or key, c, to the journala, a rotary motion is imparted to the other bars by tneans ot a 1Hright-andlcft hand bar, as B', so as to remove all ashes from the iresuiface of the grate, -and at the same time serve to liven upthe fire,and, il' required,

to move' the fuel from oneend of the grate to theother. The bars B B B being made of/this spiral or auger-shape, less iron is 1 used in makingthem, and corresponding spiral air-draught 'spaces are formed, which give increased draught, and this spiral draught keeps all sides and faces of the bars equally heated,

thus preventing them from warping, and there being` less dead surface, less fuel is required to produce a:

given heat.v

Another advantage which I claim for this. form -of grate-bar is, that two or more bars may be put together to form a section of a furnace-grate, the bars to be either movable or stationary, and when one side or face of` the bars is burned out or warped, the section may be turned over and the bars used until they are entirelyk burned outi pense of new grates or sections.

Having thus fully described my invention,

What I claim therein as new, and desire to secure by Letters Patent, is-

1. A spiral or auger-shaped har, either movable or stationary. i

2. A right-and-left handlsphal liar, which turns or revolves the other bars cn either side.

3. Agrate, forrned of spiral or auger-shaped parallel bars, all as shown, and operating substantiallyas described. EDWARD GAR-D.

Witnesses:

Grao.` M. CARPENTER, HENRY MAnsH, Jr.

ou both faces, thus 'saving the ex- 

